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GeForce 8800 GTS (G80) 640MB vs GeForce 9800 GTX+

Intro

The GeForce 8800 GTS (G80) 640MB features a core clock speed of 513 MHz and a GDDR3 memory frequency of 792 MHz. It also uses a 320-bit memory bus, and makes use of a 90 nm design. It features 96 SPUs, 48 Texture Address Units, and 20 ROPs.

Compare those specifications to the GeForce 9800 GTX+, which features core clock speeds of 738 MHz on the GPU, and 1100 MHz on the 512 MB of GDDR3 memory. It features 128 SPUs along with 64 Texture Address Units and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GTS (G80) 640MB 143 Watts
GeForce 9800 GTX+ 145 Watts
Difference: 2 Watts (1%)

Memory Bandwidth

The GeForce 9800 GTX+, in theory, should perform a small bit faster than the GeForce 8800 GTS (G80) 640MB overall. (explain)

GeForce 9800 GTX+ 70400 MB/sec
GeForce 8800 GTS (G80) 640MB 63360 MB/sec
Difference: 7040 (11%)

Texel Rate

The GeForce 9800 GTX+ is a lot (more or less 92%) better at anisotropic filtering than the GeForce 8800 GTS (G80) 640MB. (explain)

GeForce 9800 GTX+ 47232 Mtexels/sec
GeForce 8800 GTS (G80) 640MB 24624 Mtexels/sec
Difference: 22608 (92%)

Pixel Rate

The GeForce 9800 GTX+ is a small bit (approximately 15%) better at anti-aliasing than the GeForce 8800 GTS (G80) 640MB, and also will be able to handle higher resolutions while still performing well. (explain)

GeForce 9800 GTX+ 11808 Mpixels/sec
GeForce 8800 GTS (G80) 640MB 10260 Mpixels/sec
Difference: 1548 (15%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

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GeForce 8800 GTS (G80) 640MB

Amazon.com

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GeForce 9800 GTX+

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model GeForce 8800 GTS (G80) 640MB GeForce 9800 GTX+
Manufacturer nVidia nVidia
Year Nov 2006 (640) July 2008
Code Name G80 G92b
Memory 640 MB 512 MB
Core Speed 513 MHz 738 MHz
Memory Speed 1584 MHz 2200 MHz
Power (Max TDP) 143 watts 145 watts
Bandwidth 63360 MB/sec 70400 MB/sec
Texel Rate 24624 Mtexels/sec 47232 Mtexels/sec
Pixel Rate 10260 Mpixels/sec 11808 Mpixels/sec
Unified Shaders 96 128
Texture Mapping Units 48 64
Render Output Units 20 16
Bus Type GDDR3 GDDR3
Bus Width 320-bit 256-bit
Fab Process 90 nm 55 nm
Transistors 681 million 754 million
Bus PCIe x16 PCIe x16 2.0
DirectX Version DirectX 10 DirectX 10
OpenGL Version OpenGL 3.0 OpenGL 3.0

Memory Bandwidth: Bandwidth is the max amount of data (measured in MB per second) that can be transferred past the external memory interface in a second. It's calculated by multiplying the bus width by its memory clock speed. In the case of DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This is worked out by multiplying the total amount of texture units by the core speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

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GeForce 8800 GTS (G80) 640MB

Amazon.com

Check prices at:

GeForce 9800 GTX+

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

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